treadwell



J. GL'TREADW ELL.

Stdve Ventilator.

'Patented Deb. 27, 7.859.

I wmza JOHN G. TREADWELL, OF ALBANY, NEW YORK.

srovE.

Specification of Letters PatentNo. 26,631, dated December 27, 1859.

To all whom it may concern:

Be it known that I, J NO. G. TREADWELL, of Albany, in the county ofAlbany and State of New York, have invented certain new and usefulImprovements in Ventilating-Stoves, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- T Figure 1represents a planof a stove embracing my improvements. Fig. 2 represents a vertical section of the same on the line m m of Fig. 2, showingthe draft and ventilating fines. i l

The nature of my invention consists in the arrangement of two flues ofunequal capacity, in connection with the employment of.

two dampers by means of which said flues may be used independent of eachother,the smaller one as a smoke flue, and the larger one as aventilating flue which may be closed without orby converting it into asmoke flue,-for the purpose of regulating the heat of the stove andventilating the room in which it is placed.

By reference to the accompanying draw:

ings my invention will be readily understood. In the present instancethe stove to which my improved ventilator is attached, is arranged insuch relation to the ventilating and draft flues that the draft isconducted from above the fire down below the fire box, but the fines maybe arranged to communicate with the stove above the fire.

The fire box A is separated from the ash box B in the usual manner by agrate.

C represents the cast iron frameon which the cylindrical body of thestove is constrncted, between which and the fire box surrounded by it,is a space of requisite dimensions through which the draft from the fireis established in the direction of the arrow, by the communication ofthe fines therewith. i

The ventilating flue E is secured to the bottom of the stove and passesup through the center of the smoke pipe or draft flue, communicatingwith the external air through an opening in the bottom of the stove, andis provided with a slidin valve or damper 0 at this point, by means ofwhich the draft is regulated or entirely out off.

The opening 9 in the side of the ventilating.

flue extends acrossits entire width, and isyj. 1 closed by the damper a.Through this opening the ventilating flue communicates with i the draftflue H, and when closed the space between the exterior of theventilatingflne q and the surroundingsmoke pipe forms janl i the smokeflue around the ventilating flueisv independent draft flue. .Thespaceywithin insufiicient of itself to create and establish a strongdraft fromthe fire the objectof it.

being, when used independent of the yentilatingflne, only tocarry 01ftheprodncts of combustion from a slow fire but when a the ventilatingflue isconvertedintmthe smoke flue by 1 means of the damper em-x sployed for that purpose the smoke flue, thus enlarged, is snflicient tocarry pifthevprod! fire-and when the communication between. the twoiscut off by the damper; thedraft from the fire, through the independent 4means the heat of the stove is regulated and y t an independentventilating draftestablished from the room which may be shut ofiwith- Hi smoke flue is greatly diminished,bywhich out affecting the stovedraft.

A projectinglipb is formed on the inter a ucts of combustion from alively burning J rior of the ventilating flue which serves as a rest forthe damper (a) when the ventilat I ing draft is cut off, in which caseitwill be seen, the ventilating flueis converted intola draft flue. Theventilatingffluel may be opened into the draft fluewithout closingits 1communication with the. exterior crane; I

stove, as represented in the drawings b Having thus fullydescribed.myinvention 1 190 what I claim as new and desire to se 51Letters Patent isi i it Arranging the dampers a," and c,withthe a.ventilating fine E, and with the" draftwflue,- in such a manner thattheventiIatinggfIue j may be opened orclosed,iwhile the draftflue iseither open or closed for; viceversa, the

damper a, beingmade tosubserve a double a purpose substantially as setforth; I

Witnesses: 1.

S. T. SAvAeE, pp SAMUEL G.

JNo. a: TREADWELL. ff i

